cooling for high-end, possibly overclocked components, and have room for expansion and customization. Aesthetically, case modding usually includes features that show off the creator's intent: clear sides to reveal the internal components and layout, which may be adorned with LEDs, images on the graphics cards or power supply units. Computer power supplies Computer power supplies may be selected for very high quality electrical stability and performance, so that the high speed electronics reliant on them will not suffer from irregularities or disruption, and so that high power processors and graphics cards can be properly supplied with the often high levels of current needed. Power supply reviews for enthusiasts may, for example, take apart the item to identify the exact manufacturers of components, the types and sources of capacitors or power regulation circuitry involved, the quality of PCB soldering, and the calibre of any wiring. Cooling systems Cooling systems may receive careful attention, both to ensure high quality airflow and reduced operating temperatures under heavy workloads or intense activity, to support overclocking, and as part of quiet computing as well. Water cooling Water cooling, in which a water is used to cool a part of the computer, is becoming cheaper and more available. While much more expensive than an ordinary fan, it transfers heat more efficiently and is generally quieter. As building a computer becomes more of an enthusiast activity, due to the rise of tablets, laptops, and cell phones, more cases appeal to water cooling setups. Quiet computing Quiet computing is a specialist aspect of enthusiast activity, whereby the user aims to ensure the computer runs very quietly, with the goal of enjoyable ambience. Fans, hard drives, and any other noisy components may be selected for their acoustic properties, and then mounted in ways that dampen vibration and provide acoustic isolation. Motherboard The motherboard is the circuit board to which nearly all components and peripherals are connected to. It also houses the externally-accessible USB, Ethernet, audio, and display ports, which can be used to connect different peripherals. Every hardware component is connected to the motherboard in some way. Storage drives connect to a motherboard's SATA or M.2 ports and sometimes receive power directly from the motherboard. Video cards are typically seated in a PCIe slot in the motherboard, and receive up to 75 watts of power from it. In modern systems, the power supply typically has a 24-pin cable that